Symbolize the Following Argument,and Test It for Validity

Short Answer

Symbolize the following argument,and test it for validity.If valid,construct a deduction;
if invalid,assign truth values that show that the premises can be true while the conclusion is false.Use these letters:D = The drought will continue. ;S = We get an early storm. ;
M = Managers of the ski areas will be happy. ;F = There will be great fire danger next year.
The drought will continue if we don't get a storm.If we do get a storm,the managers of the ski areas will be happy.Since we'll either get a storm or we won't,it follows that either the drought will continue or the ski area managers will be happy.